Gas compressing or circulating system and apparatus for use therein.



. A. E. KEITH.

GAS COMPRESSING 0R CIRCULATING SYSTEM AND APPARATUS FOR USE THEREIN.

APPLICATION FILED JULY 10, 1912. I

1,172,535 Patented Feb. 22,1916.

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ITED STATES PATENT OFFIQE.

ALEXANDER E. KEITH, OF HINSDALE, ILLINOIS.

GAS COMPRESSING OB CIRCULATING- SYSTEM AND APPARATUS FOR USE THEREIN.

Specification of Letters Patent.

Patented Feb. 22, 1916.

Application filed July 10, 1912. Serial No. 708,673.

To aZZ whom it may concern:

Be it known that I, ALEXANDER KEITH,

a citizen of the United States of America,

and resident of I-Iinsdale, Dupage county, Illinois, have invented a certain new and useful Improvement in Gas Compressing or Circulating Systems and Apparatus for Use Therein, of which the following is a specification.

My invention relates to gas compressing and circulating systems, in which the circulation is obtained in any manner, as by the use of a compression pump, or in which the circulation is obtained by the combustion of some material, as in the case of an internal. combustion engine.

My invention also relates to a special valve for use in the system when the pressure is obtained by combustion.

Among the objects of my invention. are the following: to provide a valve for an air compressing or an air circulating system, which prevents leakage by maintaining an oil film or oil cushion between the valve and the valve seat; to provide a valve of the above character for use in a gas compressing and circulating system in which the gas may be generated and circulated by the combustion of any suitable material; and to provide certain details and features of improvement tending to increase the efificiency and serviceability of a gas compressing and circulating system and apparatus applicable for use therewith.

To the foregoing and other useful ends my invention consists in matters hereinafter set forth and claimed.

In the accompanying drawings Figure 1 represents a gas compressing and circulating system, and shows the point at which the improved valve may be inserted. Fig. 2 shows a section of the valve. Fig. 3 shows a modified form of the valve.

In the drawings like characters refer to like parts.

Referring to Fig. 2, it will be seen that the cylinder A is provided with a suitable cap B. This cap is shown screwed to the cylinder A, but may be secured thereto in any suitable manner. Between the cap and the cylinder there is provided a cushion G of any suitable material, such as lead. Leading off from the cap there is an outlet pipe I), which may be run to any point desired, such as, for example, to a reservoir E, as shown at Fig. l. lVithin the cylinder The stem .K, as shown,

A there is provided a valve. F held in positlon by the spring Gr. Beneath the valve there is an inlet opening H, which may be extended to any desired ample, to an'air compressing chamber or explosion cylinder I (see Fig. 1). The valve F is made with two stems J and K. is adapted to slide in a bore L, which extends through a cap M that fits over the valve inclosing tube It.

This bore extends to the dome piece 0, which latter is screwed to the cap M. The tube it is provided with a flange P that clears the walls of the cylinder A by a small margin. Above the dome there is provided a spring Q, which together with the weight of the dome 0, tube it and other attached parts, assists in holding the said parts 0, it, etc, in position when the valve F is raised. Beneath the flange P there is provided a number of layers of canvas or other suitable oil-holding material. It will be seen that the dome O is screwed to the cap M, but I do not limit myself to this specific arrangement. It is obvious that, if desired, the cap M and the dome 0 may be made in one piece. I have indicated that the cap is driven tight into the tube it, but this arrangement may be modified, for example, the cap may be screwedto the tube it if desired. Furthermore, the dome 0 may be made of any suitable diameter, in fact, it may be made large enough, if desired, to ust barely clear the walls of the cylinder A. When the instrument is assembled, as shown in Fig. 2, any suitable oil, such as heavy steam cylinder oil or any other suitable fluid, is put into the cylinder A. This oil R passes between the edges of the flange P and the walls of the cylinder into the canvas layers S. After passing through these layers the oil slowly passes through small crevices in the lower edge of the tube 72, into the valve chamber T and gathers around the valve F. The lower edge of the tube It is serrated to permit the passage of the oil, as described. Although the flange P is shown integral with the tube It, this construction is not essential. This flange may be made separate from the tube it and secured thereto in any suitable manner. It is to be observed that, if desirable, the bore L may be connected with the air in the cylinder A by drilling a hole in the upper part of the dome and thereby avoid any damping action on the valve F that might point, as for exbe caused from the lack of a free passage for the air in the bore L. It will be observed that the cap M is perforated to permit the passage of the gas from the chamber T into the cylinder A.

hen. connected up in a circulating system, the valve operates as follows :'Ihe gas enters the orifice H, fiows up the valve F and passes into the chamber T. From the chamber 'I it passes through the holes U into the cylinder A, beneath the dome O, thence it leaves the valve via the outlet D. As soon as the pressure is relieved beneath the valve F, the latter falls back into position due to the pressure of the spring G, and immediately a film of oil is established between the valve and the valve seat, which prevents any leakage of the gas through the inlet H. The object of the dome O is to catch whatever oil is mechanically carried over from the chamher '1 and through the holes U, and prevents its being carried into the exhaust pipe I). A modified form of the valve is shown in Fig. 3, in which a spiral pipe V is provided to prevent the oil from passing into the exhaust pipe IV. The oil is given centrifugal motion, which carries away from the center of the chamber l/V. If desired, the pipe V may be perforated all along the outer edge to permit most of the oil to be ejected before it reaches the orifice of the coil. In Fig. 3 canvas is not shown used, as in Fig. 2. Instead, the oil is merely poured into the bottom of the cup and allowed to flow unimpeded into the valve chamber and cover the same. However, the coiled pipe may be used just as well in connection with the valve, as shown in Fig. 2. It is obvious that this valve, when used in connection ith internal combustion engine or other similar gas producing devices, may protected by any suitable fire screen, which latter may be interposed in the intake pipe H.

hat I claim as my invention is 1. In a gas compressing system, the combination of a check valve and seat, a chamber, an oil within said chamber, a passage for said oil from said chamber to said valve,

have its valve F a screen in said passage to retard the flow of oil to said valve, a compressed gas, suitable means connecting the gas with the valve, a chamber inclosing said valve, a gas outlet from said chamber, and a screen outlet.

2. In a valve, an oil chamber, a valve compartment, an oil passage from the chamber to the compartment, and a separate oil passage from the compartment back to the chamber.

8. In a valve, an oil chamber, a valve compartment, an oil passage from the chamber to the compartment, an oil retarding device in said passage, and a separate oil passage from the compartment back to the chamber.

at. In a valve, an oil chamber, a valve compartment, an oil passage from the chamber to the compartment, and a separate oil .passage from the compartment back to the chamber, and a screen in said second passage.

In a valve, an oil chamber, a valve compartment, an oil passage from the chamber to the compartment, an oil retarding device in said passage, and a separate oil passage from the compartment back to the chamber, and a screen in said second passage.

(i. In a valve, an oil chamber,a valve com-- partment, an oil passage from the chamher to the compartment, and a separate oil passage from the compartment back to the chamber, and an oil deflector in said second path.

7. In a gas conducting system, a gas conducting line, a valve in said line, a gas conducting path through said valve, a valve proper and seat in said valve and in said line, an oil circuit in said valve beyond said valve proper, said circuit and line coinciding in said valve.

Signed by me at Chicago, Cook county, Illinois, this M day of June, 1912.

ALEXANDER E. KEITH.

lVitnesses B. Gamma, A. E. WALKER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.

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